POMONA — Prosecutors filed a 10-count complaint this morning against five people named as participants in an extensive local crime spree that included three killings, a kidnapping and an assault.

Four of the five defendants appeared in Pomona Superior Court today for an arraignment hearing, which was postponed, while the fifth defendant — 19-year-old Andrew Angel Valenzuela of Ontario — remains at large.

At the center of the alleged crime spree is 32-year-old Robert Caballero of Pomona, according to authorities.

Prosecutors accuse him of shooting and killing a man in Pomona in September, then participating in two local killings that occurred on consecutive days last month.

He’s also accused of assaulting a man, kidnapping an 18-year-old woman and threatening to kill her by setting her on fire.

The other four people named in the complaint — a group that include’s Caballero’s girlfriend and cousin — each allegedly participated in one killing.

Prosecutors allege that many of the crimes were committed for the benefit of a gang, and four of the defendants could face the death penalty if convicted on all charges.

The first alleged crime attributed to the group is the shooting death of Armando Vidana, who was killed Sept. 29 in Pomona.

Prosecutors have charged Caballero with murder for Vidana’s death, and have charged Caballero’s girlfriend, 20-year-old Jessica Prendiz, with allegedly serving as an accessory to the crime by reportedly attempting to dispose of the murder weapon.

The remaining defendants are named as participants in last month’s killings.

On Nov. 5, Caballero, Pete Trejo, and Anthony Caballero allegedly lay in wait for Lorraine Majnarez of Covina before kidnapping her and killing her beside Mt. Baldy Road in the San Gabriel Mountains.

On Nov. 6, Robert Caballero and Valenzuela allegedly killed David Padilla of El Monte by pounding his head in with a rock. Padilla’s body was discovered by authorities under a freeway overpass in Chino.

The four men charged with murder in connection with the two November killings are also charged with kidnapping an 18-year-old woman who was rescued by authorities when Robert Caballero was arrested Nov. 7.

The woman told police she was with the group with the two November killings were carried out, and she led authorities to Minjarez and Padilla’s bodies.

Prosecutors have said the woman, whose name has been withheld for fear of gang retaliation, would be killed if located by the group’s associates.

In addition to three counts of murder and two counts of kidnapping, prosecutors charged Robert Caballero with an Oct. 2 weapons violation, a Nov. 5 assault, and a Nov. 6 weapons violation.

He was also charged with evading a police officer for the Nov. 7 high-speed chase that ended with his arrest in Montclair.

The Caballero cousins and Trejo are being held without the possibility of bail, and Prendiz remains jailed lieu of $500,00 bail.

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